FORWARD-SCATTERED RADIATION FROM THE COMPRESSION PADDLE SHOULD BE CONSIDERED IN GLANDULAR DOSE ESTIMATIONS.

Bengt Hemdal

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

6 Citeringar (SciVal)

Sammanfattning

From major protocols on dosimetry in mammography, there is no doubt that the incident air kerma should be evaluated without backscattered radiation to the dosemeter. However, forward-scattered radiation from the compression paddle is neglected. The aim of this work was to analyse the contribution of forward-scattered radiation for typical air kerma measurements. Measurements of forward-scatter were performed with a plane-parallel ionisation chamber on four mammography units. The forward-scatter contribution to the air kerma was 2-10 % and increased with the compression paddle thickness, but also with the half-value layer value. For incident air kerma in mammography, it can be as important to consider forward-scattered as backscattered radiation. If an ionisation chamber is used, the compression paddle should be in contact with the chamber; otherwise the air kerma and absorbed dose will be underestimated. If a dosemeter based on semiconductors with much less sensitivity to scattered radiation is used, it is suggested that a forward-scatter factor (FSF) is applied. Based on the results of this work, FSF=1.06 will lead to a maximum error of ∼4 %.
Originalspråkengelska
Sidor (från-till)196-201
TidskriftRadiation Protection Dosimetry
Volym147
DOI
StatusPublished - 2011

Ämnesklassifikation (UKÄ)

  • Radiologi och bildbehandling

Fingeravtryck

Utforska forskningsämnen för ”FORWARD-SCATTERED RADIATION FROM THE COMPRESSION PADDLE SHOULD BE CONSIDERED IN GLANDULAR DOSE ESTIMATIONS.”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här